fix(search): detect irregular fragment query

If the entered query does not cleanly fall into the area of the given
options, show the current behavior as "custom".

inc/Ui/Search.php

@@ -235,12 +235,17 @@ class Search extends Ui
         ];
 
         // detect current
-        $activeOption = 'exact';
+        $activeOption = 'custom';
         foreach ($options as $key => $option) {
             if ($this->parsedQuery['and'] === $option['and']) {
                 $activeOption = $key;
             }
         }
+        if ($activeOption === 'custom') {
+            $options = array_merge(['custom' => [
+                'label' => $lang['search_custom_match'],
+            ]], $options);
+        }
 
         $searchForm->addTagOpen('div')->addClass('search-tool js-search-tool');
         // render current

inc/lang/en/lang.php

@@ -75,6 +75,7 @@ $lang['search_exact_match']    = 'Exact match';
 $lang['search_starts_with']    = 'Starts with';
 $lang['search_ends_with']      = 'Ends with';
 $lang['search_contains']       = 'Contains';
+$lang['search_custom_match']   = 'Custom';
 $lang['search_any_ns']         = 'Any namespace';
 $lang['search_any_time']       = 'Any time';
 $lang['search_past_7_days']    = 'Past week';